#include <stdio.h>
#define STLEN 10
int main(void)
{ 
char words[STLEN];
int i;
puts("Enter strings (empty line to quit):");
while (fgets(words, STLEN, stdin) != NULL && words[0] != '\n')
{ 
i = 0;
while (words[i] != '\n' && words[i] != '\0')
i++;
if (words[i] == '\n')
words[i] = '\0';
else // 如果word[i] == '\0'则执行这部分代码
while (getchar() != '\n')
continue;
puts(words);
} 
puts("done");
return 0;
}